But you could levy this charge at any large country - if Russia wanted to they could pull out of Ukraine, if China wanted to they could stop x,y or z border incursion. I think we have to unfortunately be somewhat realistic in expectations for all these countries and what they can and will do, if you are genuinely just arguing that the US could put a stop to Israel's attacks on Gaza, I don't think they actually could, there was always going to be some kind of reaction from Israel and you can just look back through history to see this happening time and time again.
Let's look at this objectively, what is the US doing that is somewhat unexpected? Biden on record talking about a two state solution is very big news, he's also spoken about Palestine as a state, there is also clear evidence of at least some positive influence on restraining Israel. As much as you look at the situation and, rightly, might think that is not 'enough' we should also have the ability to process the fact that it is something tangible. The ideal realistic, and that is the key word here, is Israel can be influenced to pause the ground invasion completely, the border clashes calm down and then countries come together and work out a way they can slowly weaken and eventually destroy Hamas. Palestine minus Hamas is well placed to have a bright future but it will take a lot of time and trust from all sides.